I had a bunch of midi files with chords, filled the whole rack. Guess if you're doing electronic music such as house, dnb, so on you could find some chords you can use. They're pretty simple, and there will be duplicates but for me this is perfect anyways.
Also, there is no specific order here, however if you follow your way up the keyboard (C-C#-D-D#. etc), you will find logical progressions.